<template>
  <Demo @hello="showHelloMsg" msg="你好啊" school="Vue" >
     <template v-slot:asd>
       <span>Vue</span>
     </template>
  </Demo>
</template>

<script>
import Demo from './components/Demo.vue'
export default {
  name: "App",
  components:{Demo},
  setup() {
    function showHelloMsg(value){
      alert(`你好啊，你触发了hello事件，我收到的参数是:${value}!`)
    }
    return {
      showHelloMsg
    }
  }
};
</script>


